// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "cc/layers/texture_layer_impl.h"

#include <stddef.h>

#include "cc/output/compositor_frame_sink.h"
#include "cc/output/context_provider.h"
#include "cc/quads/draw_quad.h"
#include "cc/quads/texture_draw_quad.h"
#include "cc/test/layer_test_common.h"
#include "gpu/command_buffer/client/gles2_interface.h"
#include "testing/gtest/include/gtest/gtest.h"

namespace cc {
namespace {

    void IgnoreCallback(const gpu::SyncToken& sync_token,
        bool lost,
        BlockingTaskRunner* main_thread_task_runner) { }

    TEST(TextureLayerImplTest, VisibleOpaqueRegion)
    {
        const gfx::Size layer_bounds(100, 100);
        const gfx::Rect layer_rect(layer_bounds);
        const Region layer_region(layer_rect);

        LayerTestCommon::LayerImplTest impl;

        TextureLayerImpl* layer = impl.AddChildToRoot<TextureLayerImpl>();
        layer->SetBounds(layer_bounds);
        layer->draw_properties().visible_layer_rect = layer_rect;
        layer->SetBlendBackgroundColor(true);

        // Verify initial conditions.
        EXPECT_FALSE(layer->contents_opaque());
        EXPECT_EQ(0u, layer->background_color());
        EXPECT_EQ(Region().ToString(), layer->VisibleOpaqueRegion().ToString());

        // Opaque background.
        layer->SetBackgroundColor(SK_ColorWHITE);
        EXPECT_EQ(layer_region.ToString(), layer->VisibleOpaqueRegion().ToString());

        // Transparent background.
        layer->SetBackgroundColor(SkColorSetARGB(100, 255, 255, 255));
        EXPECT_EQ(Region().ToString(), layer->VisibleOpaqueRegion().ToString());
    }

    TEST(TextureLayerImplTest, Occlusion)
    {
        gfx::Size layer_size(1000, 1000);
        gfx::Size viewport_size(1000, 1000);

        LayerTestCommon::LayerImplTest impl;

        gpu::Mailbox mailbox;
        impl.compositor_frame_sink()
            ->context_provider()
            ->ContextGL()
            ->GenMailboxCHROMIUM(mailbox.name);
        TextureMailbox texture_mailbox(
            mailbox,
            gpu::SyncToken(gpu::CommandBufferNamespace::GPU_IO, 0x123,
                gpu::CommandBufferId::FromUnsafeValue(0x234), 0x456),
            GL_TEXTURE_2D);

        TextureLayerImpl* texture_layer_impl = impl.AddChildToRoot<TextureLayerImpl>();
        texture_layer_impl->SetBounds(layer_size);
        texture_layer_impl->SetDrawsContent(true);
        texture_layer_impl->SetTextureMailbox(
            texture_mailbox,
            SingleReleaseCallbackImpl::Create(base::Bind(&IgnoreCallback)));

        impl.CalcDrawProps(viewport_size);

        {
            SCOPED_TRACE("No occlusion");
            gfx::Rect occluded;
            impl.AppendQuadsWithOcclusion(texture_layer_impl, occluded);

            LayerTestCommon::VerifyQuadsExactlyCoverRect(impl.quad_list(),
                gfx::Rect(layer_size));
            EXPECT_EQ(1u, impl.quad_list().size());
        }

        {
            SCOPED_TRACE("Full occlusion");
            gfx::Rect occluded(texture_layer_impl->visible_layer_rect());
            impl.AppendQuadsWithOcclusion(texture_layer_impl, occluded);

            LayerTestCommon::VerifyQuadsExactlyCoverRect(impl.quad_list(), gfx::Rect());
            EXPECT_EQ(impl.quad_list().size(), 0u);
        }

        {
            SCOPED_TRACE("Partial occlusion");
            gfx::Rect occluded(200, 0, 800, 1000);
            impl.AppendQuadsWithOcclusion(texture_layer_impl, occluded);

            size_t partially_occluded_count = 0;
            LayerTestCommon::VerifyQuadsAreOccluded(
                impl.quad_list(), occluded, &partially_occluded_count);
            // The layer outputs one quad, which is partially occluded.
            EXPECT_EQ(1u, impl.quad_list().size());
            EXPECT_EQ(1u, partially_occluded_count);
        }
    }

    TEST(TextureLayerImplTest, OutputIsSecure)
    {
        gfx::Size layer_size(1000, 1000);
        gfx::Size viewport_size(1000, 1000);

        LayerTestCommon::LayerImplTest impl;

        gpu::Mailbox mailbox;
        impl.compositor_frame_sink()
            ->context_provider()
            ->ContextGL()
            ->GenMailboxCHROMIUM(mailbox.name);
        TextureMailbox texture_mailbox(
            mailbox,
            gpu::SyncToken(gpu::CommandBufferNamespace::GPU_IO, 0x123,
                gpu::CommandBufferId::FromUnsafeValue(0x234), 0x456),
            GL_TEXTURE_2D, layer_size, false, true);

        TextureLayerImpl* texture_layer_impl = impl.AddChildToRoot<TextureLayerImpl>();
        texture_layer_impl->SetBounds(layer_size);
        texture_layer_impl->SetDrawsContent(true);
        texture_layer_impl->SetTextureMailbox(
            texture_mailbox,
            SingleReleaseCallbackImpl::Create(base::Bind(&IgnoreCallback)));

        impl.CalcDrawProps(viewport_size);

        {
            gfx::Rect occluded;
            impl.AppendQuadsWithOcclusion(texture_layer_impl, occluded);

            EXPECT_EQ(1u, impl.quad_list().size());
            ASSERT_EQ(DrawQuad::Material::TEXTURE_CONTENT,
                impl.quad_list().front()->material);
            const TextureDrawQuad* quad = TextureDrawQuad::MaterialCast(impl.quad_list().front());
            EXPECT_TRUE(quad->secure_output_only);
        }
    }

    TEST(TextureLayerImplTest, ResourceNotFreedOnGpuRasterToggle)
    {
        LayerTreeSettings settings;
        settings.gpu_rasterization_enabled = true;
        bool released = false;
        LayerTestCommon::LayerImplTest impl(settings);
        impl.host_impl()->AdvanceToNextFrame(base::TimeDelta::FromMilliseconds(1));

        gfx::Size layer_size(1000, 1000);
        gfx::Size viewport_size(1000, 1000);

        gpu::Mailbox mailbox;
        impl.compositor_frame_sink()
            ->context_provider()
            ->ContextGL()
            ->GenMailboxCHROMIUM(mailbox.name);
        TextureMailbox texture_mailbox(
            mailbox,
            gpu::SyncToken(gpu::CommandBufferNamespace::GPU_IO, 0x123,
                gpu::CommandBufferId::FromUnsafeValue(0x234), 0x456),
            GL_TEXTURE_2D);

        TextureLayerImpl* texture_layer_impl = impl.AddChildToRoot<TextureLayerImpl>();
        texture_layer_impl->SetBounds(layer_size);
        texture_layer_impl->SetDrawsContent(true);
        texture_layer_impl->SetTextureMailbox(
            texture_mailbox,
            SingleReleaseCallbackImpl::Create(base::Bind(
                [](bool* released, const gpu::SyncToken& sync_token, bool lost,
                    BlockingTaskRunner* main_thread_task_runner) { *released = true; },
                base::Unretained(&released))));

        impl.CalcDrawProps(viewport_size);

        // Gpu rasterization is disabled by default.
        EXPECT_FALSE(impl.host_impl()->use_gpu_rasterization());
        EXPECT_FALSE(released);
        // Toggling the gpu rasterization clears all tilings on both trees.
        impl.host_impl()->SetHasGpuRasterizationTrigger(true);
        impl.host_impl()->SetContentIsSuitableForGpuRasterization(true);
        impl.host_impl()->CommitComplete();
        EXPECT_TRUE(impl.host_impl()->use_gpu_rasterization());
        EXPECT_FALSE(released);
    }

} // namespace
} // namespace cc
